diff --git a/include/wlr/types/wlr_drm.h b/include/wlr/types/wlr_drm.h
index d28c7b8f..b2a5ce5a 100644
--- a/include/wlr/types/wlr_drm.h
+++ b/include/wlr/types/wlr_drm.h
@@ -29,6 +29,9 @@ struct wlr_drm_buffer {
  *
  * It only implements the minimum necessary for modern clients to behave
  * properly. In particular, flink handles are left unimplemented.
+ *
+ * Deprecated: this protocol is legacy and superseded by linux-dmabuf. The
+ * implementation will be dropped in a future wlroots version.
  */
 struct wlr_drm {
 	struct wl_global *global;